FWIW, my value in exclusivity isn't tied to people having access to a game or not. It's due to the inherent benefits of what exclusives games bring to the market, such as:
-Less platforms to target for Day 1 release. Means finite optimization/QA resources can be allocated to one system ensuring higher quality
-Competitive drive to push the title as a system seller so it stands out better in a crowded market. That game doesn't have a million devices to fall back onto, so this naturally draws out a competitive spirit & creativity from the devs to give it their best effort. The stakes are higher, and the best rise to meet or exceed what's expected of them.
-Lower costs: not needing to focus on a million devices means less costs for redundant porting teams and members, less SDK & licensing costs per platform = money saved
-Historically, many of the genre-defining, standard-setting games in the medium have been exclusives one way or another. Mario 64, Virtua Fighter (exclusive to SEGA hardware for many years until PS2), Daytona USA (ditto), Super Metroid, Zelda OoT, Gran Turismo 3 & 4, Parappa the Rapper, the early FF and Dragon Quest games, and then getting into even the Windows/DOS side of things like System Shock, Descent, or various non-IBM compatible microcomputer titles on platforms like Amiga, NEC PC-88 &PC-98, Fujitsu FM-Towns, Sharp X68000 etc.
Yes there's been a lot of non-exclusives with similar effect; I'm just pointing out how there have been many exclusives with that type of effect on the industry too.
And ultimately, I don't believe any product in the entertainment space can compete purely on features. That's a red herring IMHO. If it were true, then Disney/Marvel wouldn't need to keep their content exclusive to Disney+. Alien: Earth is premiering today; if you want to watch it, you either need Disney+ or access to the FX channel (owned by Disney). You're not watching it on HBO Max or Paramount+.
So even in spaces where things are fully hardware-agnostic, and where we'd expect the platform to compete solely on features, guess what? Exclusives still matter. Companies like Microsoft, SIE/Sony and whoever else wants to buy into the hogwash that they don't, will find out in due time how their thinking is ultimately wrong, mainly because these are not the sort of companies that have competed purely on features. And, when they have, it's actually been at pretty high costs to the consumers because guess what? You can't use content sales as a way to subsidize the cost of the features!
"Compete on features" is IMO the new "compete on hardware", only now without software exclusivity to help subsidize some of those costs. And if platform royalty cuts off software sales end up challenged too (to where platform holders earn way less than 30% off 3P sales), then this "pro-consumer" future some people are lying to themselves about is going to show them
real quick how "anti-consumer" the costs & pricing for those features end up becoming to compensate.